Diff/propshaft slop problem......

I am digging through the rear end trying to find where this slop in the prop shaft is coming from (radial slop not axial) and in the process I notice that the CV's move axially in and out of the diff ever so slightly when you rotate the propshaft through its sloppy range (about 5 or 10 degrees). Initially I was concerned that the ring/pinion may have gone out of mesh/shimming and/or that the diff was loosening in its carriers. So I removed the rear diff cover and noticed that the diff is tight in its carriers. The backlash in the ring/pinon is oh so sweet and really nice. What I did find was that the sun gears inside the Torsen unit are moving side to side and that there is about ohh roughly 0.030" of play in that washer/gear stack. This kind of weirds me out because this thing is supposed to be fundamental and shouldnt have any wear/slop in it. The fluid is relatively clean and I didnt see any bronze wear from the bronze washer.

What I dont know is if this amount of slop is normal for this particular unit. Does everybody have slop in their propshafts and do their CV's move axially by this 0.030" when you rotate the prop shaft through this sloppy range??? The only thing I can visualize that is going wrong is the washer stack wearing down opening up the slop or the housing surfaces wearing out a little but not this much. Anybody seen this before? I have been into a different version of the Torsen before on a different car and it only had about 0.005" of feeler gauge space in the gear/washer stack. Any info/specs for the RX-7 is greatly appreciated.

Does Mazda offer any service on the Torsen gearset or is it just a black box direct replacement if its damaged?

Thanks...